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| 1 /* | 1 /* |
| 2 * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved. | 2 * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved. |
| 3 * | 3 * |
| 4 * This library is free software; you can redistribute it and/or | 4 * This library is free software; you can redistribute it and/or |
| 5 * modify it under the terms of the GNU Library General Public | 5 * modify it under the terms of the GNU Library General Public |
| 6 * License as published by the Free Software Foundation; either | 6 * License as published by the Free Software Foundation; either |
| 7 * version 2 of the License, or (at your option) any later version. | 7 * version 2 of the License, or (at your option) any later version. |
| 8 * | 8 * |
| 9 * This library is distributed in the hope that it will be useful, | 9 * This library is distributed in the hope that it will be useful, |
| 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 22 | 22 |
| 23 #include "core/rendering/svg/SVGTextChunkBuilder.h" | 23 #include "core/rendering/svg/SVGTextChunkBuilder.h" |
| 24 #include "core/rendering/svg/SVGTextFragment.h" | 24 #include "core/rendering/svg/SVGTextFragment.h" |
| 25 #include "core/rendering/svg/SVGTextLayoutAttributes.h" | 25 #include "core/rendering/svg/SVGTextLayoutAttributes.h" |
| 26 #include "core/rendering/svg/SVGTextMetrics.h" | 26 #include "core/rendering/svg/SVGTextMetrics.h" |
| 27 #include "platform/graphics/Path.h" | 27 #include "platform/graphics/Path.h" |
| 28 #include "wtf/Vector.h" | 28 #include "wtf/Vector.h" |
| 29 | 29 |
| 30 namespace blink { | 30 namespace blink { |
| 31 | 31 |
| 32 class RenderObject; | 32 class LayoutObject; |
| 33 class RenderStyle; | 33 class RenderStyle; |
| 34 class RenderSVGInlineText; | 34 class RenderSVGInlineText; |
| 35 class SVGInlineTextBox; | 35 class SVGInlineTextBox; |
| 36 | 36 |
| 37 // SVGTextLayoutEngine performs the second layout phase for SVG text. | 37 // SVGTextLayoutEngine performs the second layout phase for SVG text. |
| 38 // | 38 // |
| 39 // The InlineBox tree was created, containing the text chunk information, necess
ary to apply | 39 // The InlineBox tree was created, containing the text chunk information, necess
ary to apply |
| 40 // certain SVG specific text layout properties (text-length adjustments and text
-anchor). | 40 // certain SVG specific text layout properties (text-length adjustments and text
-anchor). |
| 41 // The second layout phase uses the SVGTextLayoutAttributes stored in the indivi
dual | 41 // The second layout phase uses the SVGTextLayoutAttributes stored in the indivi
dual |
| 42 // RenderSVGInlineText renderers to compute the final positions for each charact
er | 42 // RenderSVGInlineText renderers to compute the final positions for each charact
er |
| 43 // which are stored in the SVGInlineTextBox objects. | 43 // which are stored in the SVGInlineTextBox objects. |
| 44 | 44 |
| 45 class SVGTextLayoutEngine { | 45 class SVGTextLayoutEngine { |
| 46 WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngine); | 46 WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngine); |
| 47 public: | 47 public: |
| 48 SVGTextLayoutEngine(Vector<SVGTextLayoutAttributes*>&); | 48 SVGTextLayoutEngine(Vector<SVGTextLayoutAttributes*>&); |
| 49 | 49 |
| 50 Vector<SVGTextLayoutAttributes*>& layoutAttributes() { return m_layoutAttrib
utes; } | 50 Vector<SVGTextLayoutAttributes*>& layoutAttributes() { return m_layoutAttrib
utes; } |
| 51 | 51 |
| 52 void beginTextPathLayout(RenderObject*, SVGTextLayoutEngine& lineLayout); | 52 void beginTextPathLayout(LayoutObject*, SVGTextLayoutEngine& lineLayout); |
| 53 void endTextPathLayout(); | 53 void endTextPathLayout(); |
| 54 | 54 |
| 55 void layoutInlineTextBox(SVGInlineTextBox*); | 55 void layoutInlineTextBox(SVGInlineTextBox*); |
| 56 void finishLayout(); | 56 void finishLayout(); |
| 57 | 57 |
| 58 private: | 58 private: |
| 59 void updateCharacterPositionIfNeeded(float& x, float& y); | 59 void updateCharacterPositionIfNeeded(float& x, float& y); |
| 60 void updateCurrentTextPosition(float x, float y, float glyphAdvance); | 60 void updateCurrentTextPosition(float x, float y, float glyphAdvance); |
| 61 void updateRelativePositionAdjustmentsIfNeeded(float dx, float dy); | 61 void updateRelativePositionAdjustmentsIfNeeded(float dx, float dy); |
| 62 | 62 |
| 63 void recordTextFragment(SVGInlineTextBox*, const Vector<SVGTextMetrics>&); | 63 void recordTextFragment(SVGInlineTextBox*, const Vector<SVGTextMetrics>&); |
| 64 bool parentDefinesTextLength(RenderObject*) const; | 64 bool parentDefinesTextLength(LayoutObject*) const; |
| 65 | 65 |
| 66 void layoutTextOnLineOrPath(SVGInlineTextBox*, const RenderSVGInlineText&, c
onst RenderStyle&); | 66 void layoutTextOnLineOrPath(SVGInlineTextBox*, const RenderSVGInlineText&, c
onst RenderStyle&); |
| 67 void finalizeTransformMatrices(Vector<SVGInlineTextBox*>&); | 67 void finalizeTransformMatrices(Vector<SVGInlineTextBox*>&); |
| 68 | 68 |
| 69 bool currentLogicalCharacterAttributes(SVGTextLayoutAttributes*&); | 69 bool currentLogicalCharacterAttributes(SVGTextLayoutAttributes*&); |
| 70 bool currentLogicalCharacterMetrics(SVGTextLayoutAttributes*&, SVGTextMetric
s&); | 70 bool currentLogicalCharacterMetrics(SVGTextLayoutAttributes*&, SVGTextMetric
s&); |
| 71 bool currentVisualCharacterMetrics(SVGInlineTextBox*, const Vector<SVGTextMe
trics>&, SVGTextMetrics&); | 71 bool currentVisualCharacterMetrics(SVGInlineTextBox*, const Vector<SVGTextMe
trics>&, SVGTextMetrics&); |
| 72 | 72 |
| 73 void advanceToNextLogicalCharacter(const SVGTextMetrics&); | 73 void advanceToNextLogicalCharacter(const SVGTextMetrics&); |
| 74 void advanceToNextVisualCharacter(const SVGTextMetrics&); | 74 void advanceToNextVisualCharacter(const SVGTextMetrics&); |
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| 98 float m_textPathLength; | 98 float m_textPathLength; |
| 99 float m_textPathStartOffset; | 99 float m_textPathStartOffset; |
| 100 float m_textPathCurrentOffset; | 100 float m_textPathCurrentOffset; |
| 101 float m_textPathSpacing; | 101 float m_textPathSpacing; |
| 102 float m_textPathScaling; | 102 float m_textPathScaling; |
| 103 }; | 103 }; |
| 104 | 104 |
| 105 } // namespace blink | 105 } // namespace blink |
| 106 | 106 |
| 107 #endif | 107 #endif |
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